Assuming you refer to bulb replacement and not lamp socket replacement.

1. Remove the dome lamp lens from the dome lamp bezel using a small flat bladed tool as a lever on the right side of the dome lamp lens.
2. Remove the dome lamp lens from the dome lamp bezel.
3. Remove the dome lamp bulb.
4. Install the dome lamp bulb.
5. Install the dome lamp lens to the dome lamp bezel.
6. Inserting the left side of the dome lamp lens with the two retainer tabs first them pressing in the right side until fully seated.